I think whitebit charges the biggest fees of all available exchanges, for LTC as an example the minimum amount is 0.1 LTC hotbit is the best for trading and withdrawing Martkist and altcoins, good volumes, and the fees are reasonable, you should try it and check how it works.
I tried all the exchanges so far still finexbox the best for me there's a huge of volume here it means a lot of people are trading there.